Climate averages 1991–2020
Rio Claro weather
in December.
A hot, very wet month: the joint 3rd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Rio Claro: daytime highs average 28.0°C and nights cool to about 19.4°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 229 mm of rain on roughly 21 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 28 min on an average December day.
The nearest other city in this atlas is Araras (19 km away). In December its highs average 28.1°C, about as warm as Rio Claro, with 235 mm of rain.
Among the 448 cities listed in Brazil, Rio Claro ranks joint 248th of 448 for the warmest December highs and joint 333rd of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Rio Claro is 0.5°C cooler than that mean.
From December to January, average highs stay level at 28.0°C, and monthly rainfall rises from 229 mm to 290 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rio Claro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.0°C19.9°C | 19.9°C | 290 | 23.2 | 13.313 h |
| February | 28.3°C19.9°C | 19.9°C | 214 | 19.5 | 12.913 h |
| March | 27.5°C19.1°C | 19.1°C | 173 | 18.4 | 12.212 h |
| April | 26.6°C17.2°C | 17.2°C | 68 | 8.3 | 11.612 h |
| May | 24.2°C14.2°C | 14.2°C | 57 | 6.4 | 11.111 h |
| June | 23.7°C12.9°C | 12.9°C | 39 | 4.4 | 10.811 h |
| July | 24.1°C12.3°C | 12.3°C | 35 | 3.9 | 10.911 h |
| August | 26.1°C13.3°C | 13.3°C | 32 | 4.2 | 11.311 h |
| September | 27.9°C15.7°C | 15.7°C | 72 | 7.9 | 11.912 h |
| October | 28.4°C17.5°C | 17.5°C | 128 | 13.9 | 12.613 h |
| November | 27.6°C18.1°C | 18.1°C | 184 | 16.5 | 13.213 h |
| December, selected | 28.0°C19.4°C | 19.4°C | 229 | 21.3 | 13.513 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Araras in DecemberBrazil · 19 kmHigh 28.1°C · Low 19.6°C · 235 mm rain
- Limeira in DecemberBrazil · 24 kmHigh 28.5°C · Low 19.7°C · 229 mm rain
- Leme in DecemberBrazil · 31 kmHigh 28.2°C · Low 19.7°C · 235 mm rain
- Piracicaba in DecemberBrazil · 36 kmHigh 28.8°C · Low 19.9°C · 190 mm rain
- Santa Bárbara d'Oeste in DecemberBrazil · 41 kmHigh 28.4°C · Low 19.7°C · 206 mm rain
- Americana in DecemberBrazil · 43 kmHigh 28.4°C · Low 19.7°C · 211 mm rain
- Cosmópolis in DecemberBrazil · 46 kmHigh 28.4°C · Low 19.7°C · 211 mm rain
- Pirassununga in DecemberBrazil · 48 kmHigh 28.2°C · Low 19.7°C · 215 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rio Claro) is explained once on the Rio Claro year overview and on the Sources, method and limits page.
Limeira lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.